More winter weather this week in Montreal

The light snow that fell in the pre-dawn hours Saturday sent this truck into the ditch closing the 401 near 4th Line Road at the Quebec/Ontario border. The 54 year old Quebec driver was taken to Cornwall Hospital with serious injuries. Travel will become slippery again tonight and especially Wednesday in the entire region as winter continues. (ValleyWX Photos)

More snow fell overnight in Montreal with around 3cm observed over most parts of southern Quebec. We will have a break today with partly sunny skies and mild temperatures near the freezing point. This comes after a decent weekend with a little snow and freezing drizzle early Saturday followed by sunshine and mild temperatures for the balance of the weekend. Last nights system is to our southeast this morning and will be followed by another weak clipper system with more snow tonight. It looks similar to last night with 1-3cm likely. Tuesday will be mild with high temperatures up to plus 3C.

COASTAL STORM

Beyond that the forecast becomes interesting and a little tricky for southern Quebec and extreme eastern Ontario. Low pressure is forecast to develop over the southern plains and move towards the middle Atlantic and eventually up the eastern Seaboard towards Cape Cod. This system will spread a wide swath of precipitation in the form of rain and wet snow across New England. The northern edge of the storm is forecast to affect the Townships and Gaspe as well as most of Atlantic Canada. The outer portions of the storm may catch Montreal and the border regions of New York and Vermont on Wednesday. At this time the best guest is for some snow on Wednesday in Montreal, quite windy with blowing snow, especially south of the city. 

A winter storm watch is now in effect for all of Vermont and New York including the St. Lawrence Valley of New York. They may be extended north into extreme southern Quebec later today. Accumulations at this time will range from 15-20cm over Vermont and New York as well as the Townships with perhaps 5-10cm for Montreal. Those amounts will be fine tuned up or down as the track and intensity become more clear. In any event, expect snow Wednesday across a wide area of eastern North America with slow travel by air and ground into Thursday morning.